don't use dev platform for esp32 tests

Author: Richard Unger

.github/workflows/ccpp.yml

@@ -46,11 +46,11 @@ jobs:
           #   required-libraries: Simple FOC
           #   sketch-names: '**.ino'
           - arduino-boards-fqbn: esp32:esp32:esp32 # esp32 
-            platform-url: https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_dev_index.json
+            platform-url: https://espressif.github.io/arduino-esp32/package_esp32_index.json
             required-libraries: Simple FOC
             sketches-exclude: calibrated smoothing
           - arduino-boards-fqbn: esp32:esp32:esp32s2 # esp32s2
-            platform-url: https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_dev_index.json
+            platform-url: https://espressif.github.io/arduino-esp32/package_esp32_index.json
             required-libraries: Simple FOC
             sketches-exclude: calibrated smoothing
           - arduino-boards-fqbn: STMicroelectronics:stm32:GenF1:pnum=BLUEPILL_F103C8